title: Efficient and stable CH3NH3PbI3-sensitized ZnO nanorod array solid-state solar cells.
abstract: We report for the first time the use of a perovskite (CH3NH3PbI3) absorber in combination with ZnO nanorod arrays (NRAs) for solar cell applications. The perovskite material has a higher absorption coefficient than molecular dye sensitizers, gives better solar cell stability, and is therefore more suited as a sensitizer for ZnO NRAs. A solar cell efficiency of 5.0% was achieved under 1000 W m(-2) AM 1.5 G illumination for a solar cell with the structure: ZnO NRA/CH3NH3PbI3/spiro-MeOTAD/Ag. Moreover, the solar cell shows a good long-term stability. Using transient photocurrent and photovoltage measurements it was found that the electron transport time and lifetime vary with the ZnO nanorod length, a trend which is similar to that in dye-sensitized solar cells, DSCs, suggesting a similar charge transfer process in ZnO NRA/CH3NH3PbI3 solar cells as in conventional DSCs. Compared to CH3NH3PbI3/TiO2 solar cells, ZnO shows a lower performance due to more recombination losses.
authors.affiliation: Department of Chemistry - Ångström Laboratory, Physical Chemistry, Uppsala University, Sweden. anders.hagfeldt@kemi.uu.se.
authors.forename: Dongqin
authors.initials: D
authors.lastname: Bi
authors.forename: Gerrit
authors.initials: G
authors.lastname: Boschloo
authors.forename: Stefan
authors.initials: S
authors.lastname: Schwarzmüller
authors.forename: Lei
authors.initials: L
authors.lastname: Yang
authors.forename: Erik M J
authors.initials: EM
authors.lastname: Johansson
authors.forename: Anders
authors.initials: A
authors.lastname: Hagfeldt
mesh_terms: D004396:Coloring Agents / Q000737:chemistry; D004579:Electron Transport; D007454:Iodides / Q000737:chemistry*; D007854:Lead / Q000737:chemistry*; D008027:Light; D008744:Methylamines / Q000737:chemistry*; D043942:Nanotubes / Q000737:chemistry*; D012993:Solar Energy; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D004396:Coloring Agents; D007454:Iodides; D008744:Methylamines; D007854:Lead; C027451:methylamine; D015034:Zinc Oxide